Stove-pipe damper



S. SELDEN 8v M. GRISW OLD, J1

Stove-Pipe Damper.

No. 226,680. Patented A ri|.20,1sso.

VE ans,

ATTORNEY UNITED STATES PATENT OFFICE.

SAMUEL SELDEN AND MATTHEW GBISWOLD, J It, OF ERIE, PENNSYLVANIA.

STOVE-PIPE DAMPER.

SPECIFICATION forming part of Letters Patent No. 226,680, dated April 20, 1880. Application filed November 18, 1879.

To all whom it may concern Be it known that we, SAMUEL SELDEN and MATTHEW GRISWOLD, J r., of the city and county of Erie, State of Pennsylvania, have invented certain new and useful Improvements in Stove-Pipe Dampers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification, in which-- Figure l is a side elevation of the improved damper, partly in section, to show the arrangement of the parts. Fig. 2 represents a face view of the friction-ring at the outer end of the spindle and a side view of the end of the spindle to which said ring is applied; and Fig. 3 is a perspective view of the parts forming the handle of the damper, and portions of the pipe and damper broken away.

Similar letters of reference denote corresponding parts wherever used.

The invention relates to the means for holding the damper at any desired adjustment, for

insuring its free and unobstructed rotation when it is desired to adjust, and to the construction of the handle for operating it; and it consists, first, in the combination, with the spindle to which the socketed damper is attached, and which is provided with a friction ring or sleeve and spring at its handle end similar to that described in our patent of March 13, 1877, No. 188,418, of a second socketed ring or sleeve at the opposite end of the spindle, and secured to and turning therewith, the action of the spring serving to grasp the pipe snugly between the two rings or sleeves and to hold the damper at any desired adjustment by frictional contact of the rings upon the outer surface only of the pipe, as hereinafter explained.

It further consists in making the end sockets or half-sleeves of the damper in hood form, and of greater diameter than the perforations in the pipe for the spindle, so that their contact with the pipe shallbe outside of the ragged edge of the perforations, and thereby prevent the latter from interfering with the free rotation of the damper in adjusting it and it further consists ina novel manner of uniting the wooden handle to the spindle by making the handle end of said spindle in two parts, each having a half-ring formed upon it, and one provided with a rib entering a transi'erse groove in the handle for preventing end displacement of said handle when clamped by the divided ring, as hereinafter explained.

In the accompanying drawings, A represents a section of pipe; B, the damper-spindle, passing through perforations a. a in the pipe, and G the socketed damper plate or disk secured thereon. The spindle is made square or polygonal in form, except at its outer end, as shown, and the sockets in the damper for its reception are made in the usual corresponding form, except that those marked 0, at the outer edges, are expanded at their outer ends, 0 and given a semi-cylindrical or hood form, and are of greater diameter than the perforations in the pipe for the reception of the spindle.

By this construction, if the edge of the damper comes .in contact with the perforated sides of the pipe the contact will be outside of and around the ragged edges of the perforations, and consequently the latter will not interfere with the smooth and easy rotation of the damper in adjusting it as desired.

The outer end, I), of the spindle, passing through the pipe, is reduced in size and rounded, except near its extreme end, where two spurs or projecting pins, 1), are left or formed upon it on opposite sides, as shown in Figs. 1 and 2, which enter sockets in a ring or button, D. This ring or button is provided on its inner face with a short sleeve, d, surrounding the end of the spindle and entering the perforation a in the pipe therefor, the inner face of the button overlapping the edges of said perforation and resting upon the pipe, as shown in Fig. 1. The perforation through the sleeve and ring or button is elongated, as represented at d, Fig. 2, to permit the passage of the spurs or pins b, and at right angles to this slot are formed sockets d which receive and retain the pins 1) when turned into proper position.

The spindle is provided near its handle with a collar, b and between this and the pipe A is a sleeve, E, the perforation through which is reduced to near about the diameter of the spindle at its inner end, and thence outward is enlarged, forming a shoulder at 0, against which a spring, f, arranged within the sleeve and around the spindle, rests at one end, the

other end resting against the collar D The serving to prevent end movement of the hanspindle, with the spring and sleeve placed upon dle H when clamped between the jaws or halfit. as shown, is passed through the perforarings G G, and the latter are riveted or othertions a, through the sockets in the damper, wise fastened together,'as explained. By this 35 5 then through perforations a, compressing the arrangement a secure fastening for the wooden springf when the ring or sleeve D is placed handle is obtained, and one also that faciliupon it, and turned to bring the pins Z) into the tates the removal of the handle when required. sockets (1 thereby securingit to and-causingit Having now described our invention, we to turn with the spindle. By this arrangeclaim 1o ment the spring is made to draw the sleeves 1. The damper-spindle provided with the D and E into frictional contact with the outer retaining pin or spurs b, in combination with face of the pipe upon its opposite sides, and the slotted or socketed sleeve or ring at its thus to hold the damper firmly at any an gle outer end, substantially as described. of adjustment at which it may be set. The 2. The combination, with the damper-spin- 5 I5 shank end of the spindle outside of the collar dle, of the frictional sleeves D and E and b is flattened or expanded in width, and at its springf, constructed, arranged, and operating end has an extension in the form, orthereabout, substantially as described. oia half-ring, G, made by preference to taper 3. The socketed disk or damper-plate prooutward from the shank, as shown, and pro- I vided with the semi-cylindrical hoods at the 50 2o vided on its inner concave face with a longt I ends of the side sockets, substantially as and t'udinal rib, g, as shown. for the purpose described.

G is a second half-ring, of form similar to 4C. The dam per-spindle having the divided G, but without the rib on its inner face. The shank provided with the halfring clamps part G is attached to a baseplate which fits and the retaining-rib, in combination with the ,5 25 in a suitable socket at B in the shank end of grooved wooden handle H, applied and operthe spindle, and when secured thereto by a ating' substantially as described. screw or rivet forms a part of the shank. SAML. SELDEN.

H is a handle made of wood, cylindrical in MATTHEl/V GRISVVOLD, JR.

SAM EL S. SPENCER, M. O. BURGESS.

3 length, with a transverse slit or kerf, h, which I form, and provided on one side, midway of its Witnesses: t forms a socket, into which the rib g enters, l 

